A highly sensitive photoacoustic spectrometer for near infrared overtone

Lu Yuan Hao, Jia Xiang Han, Qiang Shi, Jin Hui Zhang, Jin Jin Zheng, Qing Shi Zhu

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

By optimizing the size of a photoacoustic cell for decreasing acoustic loss and noise, and using a proper multipass arrangement for increasing light power in the cell and optical coupling to the acoustic wave, a high-resolution external laser photoacoustic spectrometer with a detection sensitivity of 6.35 × 10-9 cm-1 (1:1 signal to noise level) has been developed. Using this apparatus, the high quality Doppler-limited overtone spectra of AsH3 (600) and H2Se (60) have been observed at room temperature in the wave number regions 11 500-11 650 and 12 600-12 925 cm-1, respectively. Results are presented which highlight the applicability of this apparatus to the spectroscopy of weak optical transitions.

Original languageEnglish (US)
Pages (from-to)1975-1980
Number of pages6
JournalReview of Scientific Instruments
Volume71
Issue number5
DOIs
StatePublished - May 2000

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    Hao, L. Y., Han, J. X., Shi, Q., Zhang, J. H., Zheng, J. J., & Zhu, Q. S. (2000). A highly sensitive photoacoustic spectrometer for near infrared overtone. Review of Scientific Instruments, 71(5), 1975-1980. https://doi.org/10.1063/1.1150564